三维编织复合材料弹性性能的表面胞体效应

基金项目: 航空科学基金资助项目(04B51045) ; 北京市教育委员会共建项目建设计划资助(XK100060522)

详细信息

Effect of surface cell on elastic properties of 3D braiding composites

Institute of Solid Mechanics| Beijing University of Aeronautics and Ast ronautics| Beijing 100083| China

摘要

摘要: 在作者已有的内胞模型基础上, 结合陈利等的面胞纱线走向及Chou 等对表面纤维束截面形状的描述,建立了由面胞和内胞组合的有限元分析模型, 比较真实地模拟了三维四向编织复合材料的真实结构。通过有限元计算预测了其弹性性能, 并同实验结果进行了比较, 分析讨论了三维四向编织复合材料的面胞对整体弹性性能的影响。研究结果证明了面胞在三维四向编织复合材料弹性性能有限元预测中的重要性。
- 复合材料 /
- 三维编织 /
- 几何模型 /
- 弹性性能
Abstract: Base on the model of the authorps interior cell , the fiber t race of Chenps surface cell and the section shapeof the bundle described by Chou , et al , a new combined model including surface cells and interior cells is proposed.This model can simulate the st ructure of the three- dimensional four - step braided composites accurately. On thebasis of this model , the elastic properties of three-dimensional four- step braided composites are predicted throughthe finite element calculation. By comparing the theoretical prediction with the experimental data , the influence ofthe surface cells on the whole elastic properties was discussed. The result indicates that the surface cells are impor-tant for predicting the elastic properties of three-dimensional four-step braided composites.
- composites /
- 3D braiding /
- geomet rical model /
- elastic properties